Accessory base



FIG. 1 is a front perspective view of the accessory base showing my design;

FIG. 2 is a rear perspective view of FIG. 1;

FIG. 3 is a right side elevation view of FIG. 1;

FIG. 4 is a left side elevation view of FIG. 1;

FIG. 5 is a top plan view of FIG. 1;

FIG. 6 is a bottom plan view of FIG. 1;

FIG. 7 is a front elevation view of FIG. 1; and,

FIG. 8. is a rear elevation view of FIG. 1.

The broken line disclosure represents portions of the accessory base that form no part of the claimed design. 

CLAIM The ornamental design for an accessory base, as shown and described. 